Ratchet-drill



(Model.)

J. A. RAME. RATGHET DRILL.

Patemd oct. 9, 1883. A

N. PEYEHS, Pmmumognvhuv. wam-mgm. u C.

UNITED STATES `PATENT OFFICE.

JOHN A. HAASE, OF PHILADELPHIA, PENNSYLVANIA.

RAToHELomLL.

SEECIICATION forming part of Letters `llatent No. 286,294, dated October9, 1883.

` Appiicafiou med .my 3,1593. (Moden T 0 all", whom, it rn/nr/g/concern: Be it known that I, J OHNA. IIAASE, aeitizen of the UnitedStates, residingat No. 116 Vanhorn street, in the city and county ofPhiladelphia and State of Pennsylvania, have invented a 'new and usefulImprovement in Hand "Drilling-Machines for Drilling Metal; and I dohereby declare that the following is a full and exact description of theinvention, reference being had to the accompanying drawing and to theletters of reference marked thereon. l

My invention relates to machines, called ,ratohet-drills, all of which.have a single handle for revolving lthe drill when required. Suchmachines stop at every repeated stroke, the drill running half-.timeonly, and this, causes side strain or friction in large holes.

My machine for small holes Q not requiring much labor) runs almostcontinuously, and while drilling largeY holes, by operating the 'twohandles and running at the ordinary speed I avoid friction.

The drawing is a side view-of the machine. A is the set (or extension)screw; B, spindie; Gand C, ratchet-wheels; D and l), bodies; E and E,handles. In each body is a pawl,

(or catch which slides centrally to and fro and catches into the teethof the ratchet-wheels, and a spiral spring in. each body keeps the saidpawls properly in place.

In use a device, commonly termed old man, is clamped -on the work to bedrilled, which device is provided with a projecting arm for the point ofset-screw A to bear against,

Vthus forcing the drill that is placed in the other end of the spindleinto the metal Vto be drilled.

I claini- The combination, as herein described and shown, of lthespindle' B, two ratehet-wheels, C, rigidly connected thereto, and havingteeth inclined in the same direction, two bdies, I),

each containing' a pawl and spring for holding

